<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>CSS 样式</title>

    <link href="./css/bootstrap.min.css" rel="stylesheet">
    <script src="./js/jquery-3.2.1.min.js"></script>
    <script src="./js/bootstrap.min.js"></script>
</head>
<body>
    <!--按钮-->
    <a class="btn btn-default" href="#" role="button">Link</a>
    <button class="btn btn-default" type="submit">Button</button>
    <input class="btn btn-default" type="button" value="Input">
    <input class="btn btn-default" type="submit" value="Submit">

    <!-- Standard button -->
    <button type="button" class="btn btn-default">（默认样式）Default</button>

    <!-- Provides extra visual weight and identifies the primary action in a set of buttons -->
    <button type="button" class="btn btn-primary">（首选项）Primary</button>

    <!-- Indicates a successful or positive action -->
    <button type="button" class="btn btn-success">（成功）Success</button>

    <!-- Contextual button for informational alert messages -->
    <button type="button" class="btn btn-info">（一般信息）Info</button>

    <!-- Indicates caution should be taken with this action -->
    <button type="button" class="btn btn-warning">（警告）Warning</button>

    <!-- Indicates a dangerous or potentially negative action -->
    <button type="button" class="btn btn-danger">（危险）Danger</button>

    <!-- Deemphasize a button by making it look like a link while maintaining button behavior -->
    <button type="button" class="btn btn-link">（链接）Link</button>
</body>
</html>